Physics questions
20027 published questions with worked solutions.
- An electromagnetic wave travels in free space along the x-direction. At a particular point in space and time, B = 2 10^ -7 j T is...
- Two resistors of 200 Ω and 400 Ω are connected in series with a battery of 100 V. A bulb rated at 200 V, 100 W is connected...
- Two metal plates (A, B) are kept horizontally with separation of ( 12 ) cm, with plate A on the top. An atomizer jet sprays oil...
- A circular current loop of radius R is placed inside a square loop of side length L (L >> R) such that they are co-planar and...
- The binding energy per nucleon of ^ 209 _ 83 Bi is _______ MeV. [Take m(^ 209 _ 83 Bi) = 208.980388 u, m_p = 1.007825 u, m_n =...
- The equation of motion of a particle is given by x = a sin (50t + 3 ) cm. The particle will come to rest at time t₁ and it will...
- In a Young's double slit experiment, the intensity at some point on the screen is found to be 34 times of the maximum of the...
- Using Bohr's model, calculate the ratio of the magnetic fields generated due to the motion of the electrons in the 2ⁿᵈ and 4ᵗʰ...
- 5 moles of unknown gas is heated at constant volume from 10°C to 20°C. The molar specific heat of this gas at constant pressure...
- If sunlight is focused on a paper using convex lens, it starts burning the paper in shortest time when the lens is kept at 30 cm...
- The dimensional formula of 12 _0E^2 (ε₀ = permittivity of vacuum and E = electric field) is MᵃLᵇTᶜ. The value of 2a − b + c =...
- The diameter of a wire measured by a screw gauge of least count 0.001 cm is 0.08 cm. The length measured by a scale of least...
- The velocity of a particle is given as v = -x i + 2y j - z k m/s. The magnitude of acceleration at point (1, 2, 4) is _______...
- The position of an object having mass 0.1 kg as a function of time t is given as r = (10t^2 i + 5t^3 j) m. At t = 1 s, which of...
- A planet (P₁) is moving around the star of mass 2M in the orbit of radius R. Another planet (P₂) is moving around another star of...
- A particle is rotating in a circular path and at any instant its motion can be described as = 5t^4 40 - t^3 3 . The angular...
- Two charged conducting spheres S₁ and S₂ of radii 8 cm and 18 cm are connected to each other by a wire. After equilibrium is...
- The equation of a plane progressive wave is given by y = 5 (200t - x 150 ) where x and y are in cm and t is in second. The...
- When a coil is placed in a time dependent magnetic field the power dissipated in it is P. The number of turns, area of the coil...
- For a certain metal, when monochromatic light of wavelength λ is incident, the stopping potential for photoelectrons is 3V₀. When...